Date: Sat, 26 Jan 2002 18:13:13 -0800 From: Charles Henrich <henrich@sigbus.com> To: mark tinguely <tinguely@web.cs.ndsu.nodak.edu> Cc: freebsd-multimedia@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG Subject: Re: MBone/mrouted troubles Message-ID: <20020126181313.A84662@sigbus.com> In-Reply-To: <200201251337.g0PDbOu29231@web.cs.ndsu.nodak.edu>; from tinguely@web.cs.ndsu.nodak.edu on Fri, Jan 25, 2002 at 07:37:24AM -0600 References: <20020124200726.B70786@sigbus.com> <200201251337.g0PDbOu29231@web.cs.ndsu.nodak.edu>
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On the subject of Re: MBone/mrouted troubles, mark tinguely stated:
I believe thats it. I moved the mrouted process from my local machine (which
is running vic/sdr, etc..) to another and it works fine. Hopefully this patch
will make it into 4.5 though, its a major annoyance for personal leaf nodes!
> could you send the contents of both of your /etc/mrouted.conf and what is
> the TTL on the vic session?
>
> There was a bug discovered in FreeBSD 4.4 in MCAST forwarding when a local
> session is also went out the tunnel. The UDP checksum was not calculated on
> the forwarding packet. I do not know when the hardware checksum feature was
> added to FreeBSD but that may have been FreeBSD 4.2 also. The patch was not
> picked up in FreeBSD 4.5 (at least it is not in RC1). To look for this bug,
> perform a tcpdump of the tunnel's contents and you will see UDP checksum
> errors. If you have this problem, I can give you a simplified version of
> Bill Fenner's patch.
>
> --mark tinguely.
Charles Henrich Eon Entertainment henrich@msu.edu
http://www.sigbus.com:81/~henrich
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